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J Korean Neurol Assoc. 2002;20(2):164-168.
- "Comparative Study between Visusal Analysis and Low Resolution
Electromagnetic Tomography (LORETA) Method in the Localization
of Epileptiform Discharges"
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Mi-Ra Kim
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Department of Neurology, Inha University Medical College
- "간질파 국소화에서 시각적 분석과 Low Resolution
Electromagnetic Tomography (LORETA) 방법의 비교 연구"
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김미라 , 김경록 하충건 최성혜 이일근
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인하대학교 의과대학 신경과학교실
- Abstract
- "Background : LORETA (Low Resolution Electromagnetic Tomography) produces a three-dimensional current density
mapping from digitized EEG (electroencephalography) data. A comparison between visual waveform analysis of scalp
EEG and LORETA method may be helpful for the exact localization of epileptiform discharges. Methods : Digital EEG
data from 20 subjects showing epileptiform discharges that were localized in the left or right frontotemporal regions (F7,
F8) were studied. Those EEG waves were recorded using international 10~20 system. Phase reversals in bipolar montage
were converted to referential montage and waveforms were analyzed visually. Those spike waves were converted into
three-dimensional potential density mapping by LORETA method and maximum negative potential density region was
determined. Results : The same localization in the frontotemporal region (F7, F8) between two methods was noted in 16
subjects (80.0%). The discordant localization by LORETA method was noted in 4 subjects (20.0%). In different localization
subjects, their locations were frontopolar region (Fp1, Fp 2) in 2 subjects, lateral temporal region (T7, T8) in 1 and
posterior temporal region (P7, P8) in 1 subject, respectively. C o n c l u s I o n s : Even though the localization of epileptiform
discharges by visual waveform analysis is a traditional method, electrical potential density mapping by LORETA can be
a useful adjunctive localization method. If detailed localization is needed, LORETA method should increase accuracy. Key Words : Spike localization, Electroencephalography, LORETA"
Keywords :
- 초록
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